CPU2006 Flag Description
Tyan Transport TX46, AMD Opteron 8389

Test sponsored by Advanced Micro Devices

This result has been formatted using multiple flags files. The "default header section" from each of them appears next.


Default header section from pgi72_linux_flags

PGI Server Complete for Linux, Release 7.2. Optimization, Compiler, and Other flags for use by SPEC CPU2006


Default header section from CPU2006_flags

PathScale Compiler Suite SPEC CPU2006 Flag Description

Copyright © 2007, 2008 Pathscale LLD. 2006, 2007. QLogic Corporation. All rights reserved.

Compilers: PathScale Compiler Suite



Base Compiler Invocation

C benchmarks

C++ benchmarks

Fortran benchmarks

Benchmarks using both Fortran and C


Peak Compiler Invocation

C benchmarks

C++ benchmarks (except as noted below)

444.namd

Fortran benchmarks (except as noted below)

410.bwaves

434.zeusmp

437.leslie3d

Benchmarks using both Fortran and C (except as noted below)

435.gromacs

481.wrf


Base Portability Flags

410.bwaves

416.gamess

433.milc

434.zeusmp

435.gromacs

436.cactusADM

437.leslie3d

444.namd

447.dealII

450.soplex

453.povray

454.calculix

459.GemsFDTD

465.tonto

470.lbm

481.wrf

482.sphinx3


Peak Portability Flags

410.bwaves

416.gamess

433.milc

434.zeusmp

435.gromacs

436.cactusADM

437.leslie3d

444.namd

453.povray

454.calculix

459.GemsFDTD

465.tonto

470.lbm

481.wrf

482.sphinx3


Base Optimization Flags

C benchmarks

C++ benchmarks

Fortran benchmarks

Benchmarks using both Fortran and C


Peak Optimization Flags

C benchmarks

433.milc

470.lbm

482.sphinx3

C++ benchmarks

444.namd

447.dealII

450.soplex

453.povray

Fortran benchmarks

410.bwaves

416.gamess

434.zeusmp

437.leslie3d

459.GemsFDTD

465.tonto

Benchmarks using both Fortran and C

435.gromacs

436.cactusADM

454.calculix

481.wrf


Base Other Flags

C benchmarks

C++ benchmarks

Fortran benchmarks

Benchmarks using both Fortran and C


Peak Other Flags

C benchmarks

C++ benchmarks

444.namd

Fortran benchmarks (except as noted below)

416.gamess

459.GemsFDTD

465.tonto

Benchmarks using both Fortran and C (except as noted below)

435.gromacs

481.wrf


Implicitly Included Flags

This section contains descriptions of flags that were included implicitly by other flags, but which do not have a permanent home at SPEC.


System and Other Tuning Information

Linux Huge Page settings

In order to take full advantage of using PGI's huge page runtime library, your system must be configured to use huge pages. It is safe to run binaries compiled with "-Msmartalloc=huge" on systems not configured to use huge pages, however, you will not benefit from the performance improvements huge pages offer. To configure your system for huge pages perform the following steps:

Note that further information about huge pages may be found in your Linux documentation file: /usr/src/linux/Documentation/vm/hugetlbpage.txt

PGI_HUGE_PAGES

The maximum number of huge pages an application is allowed to use can be set at run time via the environment variable PGI_HUGE_PAGES. If not set, then the process may use all available huge pages when compiled with "-Msmartalloc=huge" or a maximum of n pages where the value of n is set via the compile time flag "-Msmartalloc=huge:n.

Using numactl to bind processes and memory to cores

For multi-copy runs or single copy runs on systems with multiple sockets, it is advantageous to bind a process to a particular core. Otherwise, the OS may arbitrarily move your process from one core to another. This can effect performance. To help, SPEC allows the use of a "submit" command where users can specify a utility to use to bind processes. We have found the utility 'numactl' to be the best choice.

numactl runs processes with a specific NUMA scheduling or memory placement policy. The policy is set for a command and inherited by all of its children. The numactl flag "--physcpubind" specifies which core(s) to bind the process. "-l" instructs numactl to keep a process memory on the local node while "-m" specifies which node(s) to place a process memory. For full details on using numactl, please refer to your Linux documentation, 'man numactl'

Note that some versions of numactl, particularly the version found on SLES 10, we have found that the utility incorrectly interprets application arguments as it's own. For example, with the command "numactl --physcpubind=0 -l a.out -m a", numactl will interpret a.out's "-m" option as it's own "-m" option. To work around this problem, a user can put the command to be run in a shell script and then run the shell script using numactl. For example: "echo 'a.out -m a' > run.sh ; numactl --physcpubind=0 bash run.sh"

ulimit -s <n>

Sets the stack size to n kbytes, or unlimited to allow the stack size to grow without limit.

ulimit -l <n>

Sets the maximum size of memory that may be locked into physical memory.

NCPUS

Sets the maximum number of OpenMP parallel threads auto-parallelized (-Mconcur) applications may use.

powersave -f

Makes the powersave daemon set the CPUs to the highest supported frequency.

HUGETLB_MORECORE

Setting this to yes instructs libhugetlbfs to override libc's normal morecore() function with a hugepage version and use it for malloc().


Flag description origin markings:

[user] Indicates that the flag description came from the user flags file.
[suite] Indicates that the flag description came from the suite-wide flags file.
[benchmark] Indicates that the flag description came from a per-benchmark flags file.

The flags files that were used to format this result can be browsed at
http://www.spec.org/cpu2006/flags/pgi72_linux_flags.html,
http://www.spec.org/cpu2006/flags/CPU2006_flags.20090710.html,
http://www.spec.org/cpu2006/flags/amd-platform-amd909gh.html.

You can also download the XML flags sources by saving the following links:
http://www.spec.org/cpu2006/flags/pgi72_linux_flags.xml,
http://www.spec.org/cpu2006/flags/CPU2006_flags.20090710.xml,
http://www.spec.org/cpu2006/flags/amd-platform-amd909gh.xml.


For questions about the meanings of these flags, please contact the tester.
For other inquiries, please contact webmaster@spec.org
Copyright 2006-2014 Standard Performance Evaluation Corporation
Tested with SPEC CPU2006 v1.1.
Report generated on Tue Jul 22 23:38:06 2014 by SPEC CPU2006 flags formatter v6906.